Cita APA (7a ed.)

Sperling, D., & Gordon, D. (2009). Two billion cars: Driving toward sustainability. Oxford University Press.

Cita Chicago Style (17a ed.)

Sperling, Daniel, y Deborah Gordon. Two Billion Cars: Driving Toward Sustainability. Oxford ; New York: Oxford University Press, 2009.

Cita MLA (8a ed.)

Sperling, Daniel, y Deborah Gordon. Two Billion Cars: Driving Toward Sustainability. Oxford University Press, 2009.